Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Polyphase
Patent
1996-01-30
1997-04-22
Raevis, Robert
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Polyphase
G01R 1900
Patent
active
056232012
ABSTRACT:
A 3-phase power meter for measuring and displaying a set of physical quantities of R-, S- and T-phase electric power generated by a 3-phase AC alternator includes a display unit for displaying the set of the measured physical quantities of the R-, S- and T-phase electric power, the display unit having three display arrays integrally formed therein, each of the display arrays having a plurality of thin and elongated display elements closely stacked in a column to produce a bar-type graph, each of the display arrays serving to indicate the level of each of the measured physical quantities of the R-, S- and T-phase electric power in a discrete manner, respectively and a screen attached on the surface of the display unit and having an opening through which the levels of the R- S- and T-phase electric power indicated by the display arrays are made visible all together, wherein the opening has an outline to form a shape of a symbol used to identify of a measured physical quantity of the electric power.
REFERENCES:
patent: 4333050 (1982-06-01), Yeasting
patent: 4641090 (1987-02-01), Danby
patent: 4753117 (1988-06-01), Osterhout et al.
patent: 4890088 (1989-12-01), Woodell
patent: 4908868 (1990-03-01), McTaggart
Raevis Robert
Samsung Electronics Co,. Ltd.
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